RESONANT MUTUAL INDUCTANCE PARTIAL DISCHARGE DETECTION DEVICE AND DETECTION METHOD FOR CABLE JOINT

The present invention provides a resonant mutual inductance partial discharge detection device and detection method for cable joint, the device comprises a partial discharge acquisition sensor and a partial discharge signal processor, the device further comprises a partial discharge signal resonance output unit and a partial discharge signal resonance acquisition unit, the partial discharge acquisition sensor and the partial discharge signal resonance output unit are in wired connection and are provided inside a sheath voltage-withstand layer of the cable joint, the partial discharge signal resonance output unit and the partial discharge signal resonance acquisition unit are in wireless connection, and the partial discharge signal resonance acquisition unit and the partial discharge signal processor are in wired connection and are provided outside the sheath voltage-withstand layer of the cable joint. The present invention may wirelessly transmit a partial discharge signal to an outside of an insulating layer of the cable. A change of the original cable joint is small, a original waterproof and voltage-withstand process of the cable joint is reserved, no semiconductor electronic element is arranged in the insulating layer of the cable joint, so service life of components in the insulating layer of the cable joint is ensured to be longer than that of the cable, and is safe and reliable.